The Economist has a commentary on the Tories today.  Amongst their analysis of the national picture, they set out the dilemma for the Tories in London:

One hazard is “Boris Johnson, the party's popular but disorganised candidate in London's mayoral election next May. Party staff are concerned that a lazy campaign ending in a heavy defeat by Ken Livingstone, the Labour incumbent, would reflect badly on Mr Cameron. Some believe a victory for Mr Johnson would be even worse, if he turned out to be a shambolic leader of Britain's capital”.

You have to wonder why they selected him the first place…  if he loses, he damages their party – and if he wins, he damages our city!